package com.gb.web.common.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;


public class FtpUtil {
    private final static String hostname = "172.25.50.14";
    private final static int    port     = 21;
    private final static String username = "fff2";
    private final static String password = "123123";
    private final static String pathname = "/var/ftp/guest";

    private static FtpUtil instance;
	public static FtpUtil getInstance() {
		return instance == null ? instance = new FtpUtil() : instance;
	}
	
    /**
     * 上传文件（可供Action/Controller层使用）
     * @param hostname FTP服务器地址
     * @param port FTP服务器端口号
     * @param username FTP登录帐号
     * @param password FTP登录密码
     * @param pathname FTP服务器保存目录
     * @param fileName 上传到FTP服务器后的文件名称
     * @param inputStream 输入文件流
     * @return
     */
    public static boolean uploadFile(String hostname, int port, String username, String password, String pathname,
                                     String fileName, InputStream inputStream) {
        boolean flag = false;
        FTPClient ftpClient = new FTPClient();
        ftpClient.setControlEncoding("UTF-8");
        try {
            // 连接FTP服务器
            ftpClient.connect(hostname, port);
            // 登录FTP服务器
            ftpClient.login(username, password);
            // 是否成功登录FTP服务器
            int replyCode = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(replyCode)) {
                return flag;
            }

            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.makeDirectory(fileName); 
            ftpClient.changeWorkingDirectory(fileName);
            ftpClient.enterLocalPassiveMode();
            ftpClient.storeFile(fileName, inputStream);
            inputStream.close();
            ftpClient.logout();
            flag = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    ftpClient.disconnect();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return flag;
    }

    public static boolean uploadEvidenceFile(String hostname, int port, String username, String password, String spId,
                                             String pathname, String fileName, InputStream inputStream) {
        boolean flag = false;
        FTPClient ftpClient = new FTPClient();
        ftpClient.setControlEncoding("UTF-8");
        try {
            // 连接FTP服务器
            ftpClient.connect(hostname, port);
            // 登录FTP服务器
            ftpClient.login(username, password);
            // 是否成功登录FTP服务器
            int replyCode = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(replyCode)) {
                return flag;
            }
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.changeWorkingDirectory(pathname);
            ftpClient.makeDirectory(spId);
            ftpClient.changeWorkingDirectory(spId + "/");
            ftpClient.enterLocalPassiveMode();
            ftpClient.storeFile(fileName, inputStream);
            inputStream.close();
            ftpClient.logout();
            flag = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    ftpClient.disconnect();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return flag;
    }

    /**
     * 上传文件（可对文件进行重命名）
     * @param hostname FTP服务器地址
     * @param port FTP服务器端口号
     * @param username FTP登录帐号
     * @param password FTP登录密码
     * @param pathname FTP服务器保存目录
     * @param filename 上传到FTP服务器后的文件名称
     * @param originfilename 待上传文件的名称（绝对地址）
     * @return
     */
    public static boolean uploadFileFromProduction(String hostname, int port, String username, String password,
                                                   String pathname, String filename, String originfilename) {
        boolean flag = false;
        try {
            InputStream inputStream = new FileInputStream(new File(originfilename));
            flag = uploadFile(hostname, port, username, password, pathname, filename, inputStream);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 上传文件（不可以进行文件的重命名操作）
     * @param hostname FTP服务器地址
     * @param port FTP服务器端口号
     * @param username FTP登录帐号
     * @param password FTP登录密码
     * @param pathname FTP服务器保存目录
     * @param originfilename 待上传文件的名称（绝对地址）
     * @return
     */
    public static boolean uploadFileFromProduction(String hostname, int port, String username, String password,
                                                   String pathname, String originfilename) {
        boolean flag = false;
        try {
            String fileName = new File(originfilename).getName();
            InputStream inputStream = new FileInputStream(new File(originfilename));
            flag = uploadFile(hostname, port, username, password, pathname, fileName, inputStream);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 删除文件
     * @param hostname FTP服务器地址
     * @param port FTP服务器端口号
     * @param username FTP登录帐号
     * @param password FTP登录密码
     * @param pathname FTP服务器保存目录
     * @param filename 要删除的文件名称
     * @return
     */
    public static boolean deleteFile(String hostname, int port, String username, String password, String pathname,
                                     String filename) {
        boolean flag = false;
        FTPClient ftpClient = new FTPClient();
        try {
            // 连接FTP服务器
            ftpClient.connect(hostname, port);
            // 登录FTP服务器
            ftpClient.login(username, password);
            // 验证FTP服务器是否登录成功
            int replyCode = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(replyCode)) {
                return flag;
            }
            // 切换FTP目录
            ftpClient.changeWorkingDirectory(pathname);
            ftpClient.dele(filename);
            ftpClient.logout();
            flag = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    ftpClient.logout();
                } catch (IOException e) {

                }
            }
        }
        return flag;
    }

    /**
     * 下载文件
     * @param hostname FTP服务器地址
     * @param port FTP服务器端口号
     * @param username FTP登录帐号
     * @param password FTP登录密码
     * @param pathname FTP服务器文件目录
     * @param filename 文件名称
     * @param localpath 下载后的文件路径
     * @return
     */
    public static String downloadFile(String hostname, int port, String username, String password, String pathname,
                                      String filename, String localpath) {
        FTPClient ftpClient = new FTPClient();
        try {
            // 连接FTP服务器
            ftpClient.connect(hostname, port);
            // 登录FTP服务器
            ftpClient.login(username, password);
            // 验证FTP服务器是否登录成功
            ftpClient.setControlEncoding("UTF-8");
            int replyCode = ftpClient.getReplyCode();
            if (!FTPReply.isPositiveCompletion(replyCode)) {
                return null;
            }
            // 切换FTP目录
            ftpClient.changeWorkingDirectory(pathname);
            File localFile = new File(localpath + "/" + filename);
            OutputStream os = new FileOutputStream(localFile);
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            ftpClient.enterLocalPassiveMode();
            boolean val = ftpClient.retrieveFile(filename, os);
            String str = "";
            str = localFile.getAbsolutePath();

            os.close();
            ftpClient.logout();
            return str;
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (ftpClient.isConnected()) {
                try {
                    ftpClient.logout();
                } catch (IOException e) {

                }
            }
        }
        return null;
    }

}
